Mercurial > nagslang

annotate nagslang/render.py @ 219:f9e92d540bfa

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Less hacky rotation suppression.
author Jeremy Thurgood <firxen@gmail.com>
date Wed, 04 Sep 2013 16:21:21 +0200
parents 9e2ef2f15035
children 0c0d5919f70a
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1 import math
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2
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3 import pygame
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4 import pymunk
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5
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6 from nagslang.options import options
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7
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8
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9 class Renderer(object):
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10 def set_game_object(self, game_object):
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11 self.game_object = game_object
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12
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13 def _render_shape(self, surface):
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14 shape = self.game_object.get_shape()
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15 # Less general that pymunk.pygame_util.draw, but also a lot less noisy.
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16 color = getattr(shape, 'color', pygame.color.THECOLORS['lightblue'])
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17 # We only explicitly draw Circle and Poly shapes. Everything else we
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18 # forward to pymunk.
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19 if isinstance(shape, pymunk.Circle):
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20 centre = pymunk.pygame_util.to_pygame(shape.body.position, surface)
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21 radius = int(shape.radius)
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22 pygame.draw.circle(surface, color, centre, radius, 2)
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23 elif isinstance(shape, pymunk.Poly):
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24 # polygon bounding box
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25 points = [pymunk.pygame_util.to_pygame(p, surface)
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26 for p in shape.get_vertices()]
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27 pygame.draw.lines(surface, color, True, points, 2)
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28 else:
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29 pymunk.pygame_util.draw(surface, shape)
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30
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31 def render(self, surface):
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32 if options.debug:
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33 self._render_shape(surface)
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34
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35 def animate(self):
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36 # Used by time animatations to advance the clock
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37 pass
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38
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39
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40 def image_pos(image, pos):
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41 return (pos[0] - image.get_width() / 2,
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42 pos[1] - image.get_height() / 2)
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43
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44
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45 class ImageRenderer(Renderer):
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46 rotate = True # Set to `False` to suppress image rotation.
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47
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48 def __init__(self, image):
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49 self._image = image
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50
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51 def get_image(self):
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52 return self._image
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53
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54 def rotate_image(self, image):
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55 if not self._rotate:
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56 return image
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57 angle = self.game_object.get_render_angle() * 180 / math.pi
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58 return pygame.transform.rotate(image, angle)
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59
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60 def render_image(self, surface, image):
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61 image = self.rotate_image(image)
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62 pos = self.game_object.get_render_position(surface)
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63 surface.blit(image, image_pos(image, pos))
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64
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65 def render(self, surface):
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66 self.render_image(surface, self.get_image())
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67 super(ImageRenderer, self).render(surface)
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68
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69
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70 class ImageStateRenderer(ImageRenderer):
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71 def __init__(self, state_images):
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72 self._state_images = state_images
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73
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74 def get_image(self):
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75 return self._state_images[self.game_object.puzzler.get_state()]
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76
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77
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78 class TimedAnimatedRenderer(ImageRenderer):
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79 def __init__(self, images, frame_ticks=1):
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80 self._images = images
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81 self._frame_ticks = frame_ticks
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82 self._frame_tick = 0
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83 self._frame = 0
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84
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85 def advance_tick(self):
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86 self._frame_tick += 1
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87 if self._frame_tick > self._frame_ticks:
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88 self._frame_tick = 0
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89 self._frame += 1
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90 if self._frame >= len(self._images):
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91 self._frame = 0
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92
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93 def reset(self):
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94 self._frame_tick = 0
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95 self._frame = 0
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96
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97 def get_image(self):
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98 return self._images[self._frame]
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99
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100 def animate(self):
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101 self.advance_tick()
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102
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103
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104 class MovementAnimatedRenderer(TimedAnimatedRenderer):
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105 def animate(self):
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106 if self.game_object.is_moving:
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107 self.advance_tick()
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108 else:
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109 self.reset()
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110
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111
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112 class RendererSelectionRenderer(Renderer):
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113 def __init__(self, renderers):
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114 self._renderers = renderers
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115
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116 def set_game_object(self, game_object):
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117 self.game_object = game_object
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118 for renderer in self._renderers.values():
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119 renderer.set_game_object(game_object)
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120
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121 @property
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122 def renderer(self):
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123 return self._renderers[self.select_renderer()]
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124
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125 def render(self, surface):
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126 return self.renderer.render(surface)
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127
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128 def animate(self):
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129 return self.renderer.animate()
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130
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131 def select_renderer(self):
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132 raise NotImplementedError()
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133
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134
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135 class FacingSelectionRenderer(RendererSelectionRenderer):
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136 def __init__(self, renderers):
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137 for renderer in renderers.values():
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138 renderer.rotate = False
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139 super(FacingSelectionRenderer, self).__init__(renderers)
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140 self._face = 'left'
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141
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142 def _update_facing(self, angle):
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143 if abs(angle) < math.pi / 2:
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144 self._face = 'right'
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145 elif abs(angle) > math.pi / 2:
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146 self._face = 'left'
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147
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148 def select_renderer(self):
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149 angle = self.game_object.get_render_angle()
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150 self._update_facing(angle)
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151 return self._face
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152
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153
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154 class ShapeRenderer(Renderer):
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155 def render(self, surface):
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156 self._render_shape(surface)
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157 super(ShapeRenderer, self).render(surface)
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158
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159
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160 class ShapeStateRenderer(ShapeRenderer):
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161 """Renders the shape in a different colour depending on the state.
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162
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163 Requires the game object it's attached to to have a puzzler.
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164 """
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165 def render(self, surface):
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166 if self.game_object.puzzler.get_state():
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167 color = pygame.color.THECOLORS['green']
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168 else:
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169 color = pygame.color.THECOLORS['red']
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170
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171 self.game_object.get_shape().color = color
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172 super(ShapeStateRenderer, self).render(surface)